Personality drift even with multiple memories and instructions

Curious if anyone has come up with a way to permanently stop instruction/memory drift?

It seems 4o reverts back into flowery and overly expressive responses even when asked to be objective and refrain from that behavior even with multiple memories and instructions.

Cheers

Can you share the prompt(s) you’re using?

Any examples we can try to reproduce?

Seems? How long is the past history thread when it happens?